Mangle with variable-pressure rollers



Feb. 21, 1928.

E. RUMSCH MANGLE WITH VARIABLE PRESSURE ROLLERS Filed April 26, 1927 Patented I 'eb. 21, 1928.

UNITED STATES PATENT OFFICE.

7 Application filed April as, 1927, Serial No. 188,768, and in Germany. July 1, 1926.

Mangles with a ntral steam heated cylinder and pressure ollers placed around the cylinder with means for varying the pressure of the said rollers, are of high efiiciency. Thecpressure rollers however are usually covered withtextile material blankets and-as a result'there occurs wet steam in the covering in the course of a short time which is a hindrance and also renders it necessary to re- 10 place the roller coverings frequently, with interruptions to the'working of the apparatus'and, of course, increased working CQSt S.

The present invention has for ObJGCt a mangle having pressure rollers arranged as above set forth, that is with means for varying the pressure, in which apparatus the inconvenient and annoying wet steam may be removed as formed and according to the invention each pressure roller interior is put into communication with a suction device which will exert a suction effect on the interior of the roller whilst still allowing of variation of the pressure, that is, variation in the positionof a pressure roller relative to 125 the central cylinder, as desired.

7 The invention in a very convenient method of carrying it into effect will now be fully de-- scribed with reference tothe annexed drawings wherein Figure 1 is an end elevation of so a mangle with five pressure rollers and-Figure 2 is a fragmentary view taken at right angles to Figure 1 and showing to an enlarged scale the ends of a pressure roller and the end of the central cylinder with the means for allowing of variation of roller pressure whilst still maintaining the said roller in tight contact with a suction device. The pressure rollers a are perforated and covered with blankets of textile material and 40 they are borne in curved end brackets d in the usual manner, the brackets being pivoted so that the rollers may be raised from the central heated cylinder 0. Each pressure roller is provided at one end with theconical end I) and the roller is maintained against the central cylinder by springs contained in a spring casing e. I

Upon one end bracket d is placed a casing air through a pipe I) passing through the end 6 and roller hearing it the roller is in dpressure roller is borne in the bracket by means of a bearing It already to -referred to, and in order to prevent access of air to the casing each such bearing on the suction side is. provided with a flange z and a felt or like washer is having an oval central orifice, the said Washer being pressed against the face of the casing f by the flange z. The flange and washer are sufficiently long to "ensure that the movement of the pressure roller as a result of variation of spring pressure will not cause the slit in the 7 bracket d, through which the pipe 6 enters, to be uncovered, and in all positions the partial vacuum caused by'suction will maintain the washer is against the casing f, whilst the Washer offers no hindrance to movement 7 of the roller bearing.

It will be understood that variations of the mechanical details may be introduced so long as the spirit of the invention, viz: arrangement of a suction device which will cause a partial vacuum in each textile material covered pressure roller whilst still permitting r the said roller'to have variable pressure applied between it and the central cylinder, is

preserved.

I claim 1. In a mangle, a central cylinder, 21 plurality of textile blanketed pressure rollers placed around the cylinder on brackets, movable bearin s for the said rollers in the said 0 brackets, with means for applying variable pressure to the said roller bearings, an ex haust casing in communication with the interiors of the pressure rollers, and air-tight packings between the bearings and the exhaust casing, and preservingtheir'air tightness in all positions of the movable'bearings.

2. In a mangle, a central cylinder, a plurality of pressure rollers placed around the said cylinder on brackets, a conical end on 1 0 which 6 and b are 55 each pressure roller and a hearing within a bracket for such conical end, an exhaust casing on one of the brackets, a communication pipe between the interior of each pressure a roller and the said exhaust casing whlch pipe passes through the conical end, a slot in the racket through which slot the said pipe my hand.

EMIL RUMSCH. 

